Corporation state country name.

No definition available.

Name:	fnko_CorporationStateCountryName
Namespace Prefix:	fnko_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Formation date of Corporation.

+ References

No definition available.

+ Details

Name:	fnko_FormationDateOfCorporation
Namespace Prefix:	fnko_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Organization, consolidation and presentation of financial statements.

+ References

No definition available.

+ Details

Name:	fnko_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureLineItems
Namespace Prefix:	fnko_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e848-128460

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e845-128460

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

Name:	us-gaap_BusinessAcquisitionEffectiveDateOfAcquisition1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the limited liability company (LLC) or limited partnership (LP) was formed, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LimitedLiabilityCompanyOrLimitedPartnershipBusinessFormationDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

Name:	us-gaap_ProceedsFromIssuanceInitialPublicOffering
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

Name:	us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Per share or per unit amount of equity securities issued.

+ References

No definition available.

+ Details

Name:	us-gaap_SharesIssuedPricePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_StockIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611443-123010

+ Details

Name:	us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsidiarySaleOfStockAxis=us-gaap_IPOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=fnko_ACONAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=fnko_CommonUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=fnko_FunkoHoldingsLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=fnko_FunkoLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Basis of Presentation and Description of Business - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Nov. 06, 2017	Dec. 31, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Net proceeds from initial offering after deducting underwriting discounts and commissions			$ 117,337
IPO [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Formation date		Apr. 21, 2017
Corporation state name		Delaware
IPO [Member] \| Class A Common Stock [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Shares issued under IPO	10,416,666
Sale of stock price per share	$ 12.00
Net proceeds from initial offering after deducting underwriting discounts and commissions	$ 117,300
ACON Acquisition [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Business acquisition date		Oct. 30, 2015
Funko Acquisition Holdings, L.L.C. [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Formation date		Sep. 24, 2015
Funko Acquisition Holdings, L.L.C. [Member] \| Common Units [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of shares sold	10,416,666
Funko Acquisition Holdings, L.L.C. [Member] \| IPO [Member] \| Class A Common Stock [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Shares issued under IPO		10,416,666
Funko Holdings LLC [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Formation date		May 28, 2013
Funko Holdings LLC [Member] \| Funko Acquisition Holdings, L.L.C. [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Ownership percentage		100.00%
Funko Holdings LLC [Member] \| Funko Acquisition Holdings, L.L.C. [Member] \| Funko LLC [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Ownership percentage		100.00%